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ID = 68073
Tube type:  Solid State Tube Replacement 
Identical to TR1077
First Source (s)
Feb.1973 : - - Manufacturers Literature

Base Miniatur-7-Pin-Base B7G, USA 1940
Was used by Telephony

"Fetron", solid state replacement for 407A tube, manufactured by Teledyne.

The "Fetron family" was designed for replace vacuum tubes in telephone communications equipments (carrier, multiplexer, demultiplexer etc.) or lab equipments (for example
HP 400 VTVM conversion kit, Tektronix CA plugin conversion kit).

A "Fetron" is not a universal replacement for vacuum tubesand must be configured differently for certain applications.
For example, the "Fetron" configuration will generally be different for a pentode amplifier and an oscillator.

The "Fetron" is composed of one or more high voltage JFETs, a protective fuse, and R/C networks for tailoring to the required circuit
performance parameters.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 27 x 14 mm / x 1.06 x 0.55 inch
Information source

Just Qvigstad
TR1077: Manufacturers data
Patrice Zeissloff


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